Will need to pull the finish off the stock surface first, then use a primer coat to bond to and fill in the surface wood grain, then uses Duracoat last that will bond to the primer.
Also, if there is any nasty dents of dings, you can fill them with bondo before you do the primer coat.
As for the effort, kind of a waste killing a nice piece of wood is still in good condition, and you can pick up synthetic stocks that you can just Duracoat if you can't find one in the color you want. Plus with a synthetic stock, built in pistol grip and even flash light placement on the forearm if your going for a tactial set up.
Also to point out, since the wood stock is going to be softer than a synthetic stock, any dents to the wood stock after it has been coated, will end up with the Duracoat peeling off in that dented section.
So if your looking for a better option, then bed liner paint with the stock left in a raw start to begin with. The bed liner coating is thicker/stays wet longer before it dries, will seep into the pores of the wood grain, to get a better adhesion to the stock instead.